11111223456788 has 48 divisors (see below), whose sum is σ = 24039183866880. Its totient is φ = 4375937378304.

The previous prime is 11111223456769. The next prime is 11111223456803. The reversal of 11111223456788 is 88765432211111.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68361293 + ... + 68523636.

It is an arithmetic number, because the mean of its divisors is an integer number (500816330560).

Almost surely, 2^{11111223456788} is an apocalyptic number.

It is an amenable number.

11111223456788 is an abundant number, since it is smaller than the sum of its proper divisors (12927960410092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111223456788 is a wasteful number, since it uses less digits than its factorization.

11111223456788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136885176 (or 136885174 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

Adding to 11111223456788 its reverse (88765432211111), we get a palindrome (99876655667899).

The spelling of 11111223456788 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-eight".